Rotary screen.



PATENTED JAN. 28, 1908.

G. F. SMAILBS, ROTARY SCREEN. APPLICATION FILED FEB.28.1907.

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GEORGE FRANKLIN SMAILES, OF NEWARK, OHIO.

ROTARY SCREEN.

Specification of Letters Patent.

Patented Jan. 28, 1908.

Application filed February 28. 1907 Serial No. 359.761-

To all whom it may concern:

Be it known that I, GEORGE F. SMAILEs, a citizen of the United States,residing at Newark, in the county of Licking and State of Ohio, haveinvented new and useful Improvements in Rotary Screens, of which thefollowing is a specification.

This invention relates to rotary screens, and it has for its object toprovide a device of this class which may be employed for the purpose ofscreening and sifting sand, and other materials such as loam,fertilizing material and the like, and which will successfully operateto separate the finer from the coarser properties under variouscircumstances, whether the material operated upon be dry or wet.

Further objects of the invention are to simplify and improve theconstruction and -a crank '8 whereby it may for the purpose operation ofthis class of devices.

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and assemblage of partswhich will be hereinafter fully described and par ticularly pointed outin the claims.

In the drawings, Figure 1 is a side elevation, partly in section, of arotary screen constructed in accordance with the invention. Fig. 2 is anend view of the screen and a portion of the supporting frame and relatedparts. Fig. 3 is a detail plan view of a portion of the guide chute andthe auxiliary chute.

Corresponding parts in the several figures are denoted by likecharactersof reference.

A simple frame structure is provided in cluding a sill 1, uprights 23,side rails 4 and crossbars,56 affording bearings for an in clined shaft7 having at its upper or front end be rotated. The shaft 7 carries adrum D which is suitably connected therewith and supported thereuponsaid drum comprising a solid portion 9 at its upper end and foraminousportion 10, which latter may be constructed of screen wire of anysuitable mesh, it being also understood that portions of different meshmay be included in a single drum for the purpose of grading the screenproduct.

The solid or inlet portion of'the drum is provided with an annularflange 11, and it is provided with encircling hoops or bands 12 ofstrengthening and reinforcing the construction. A hoop 14 at the gravellower or outlet portion of the screen carries, upon a plurality ofradial arms or brackets 15, a disk or diaphragm 16 which serves toprevent the material discharged over the tail end of the drum fromscattering; this feature being especially useful when the machine is setup for operation indoors.

The uprights 2 at the front end of the machine support ahopper 17 forthe additional support of which braces 18 are provided. Braces 19 arealso used, wherever their presence may be found desirable, for thepurpose of reinforcing the frame structure.

Suitably supported in the frame, beneath the hopper 17 is a chute 20 forthe purpose of directing material from the hopper towards the inlet ofthe drum; the chute 20 is slotted, at 21, for the passage of the shaft 7and below the slot is supported an auxiliary chute 22 over whichmaterial leaking through the slot 21 and passing over the chute 20 willbe conveyed into the open inlet end of the drum where it is depositedupon the solid portion 9 of the latter. A shield 23,which may consist ofboards nailed to the uprights 2, is provided for the purpose ofpreventing unscreened material that may drop from the shovel which isused in feeding the hopper 17 from being, mixed with the screenedmaterial below the drum.

An apron 24 is hingedly supported adjacent to the sill 1 of the machine;this partition member may be adjusted in various positions for thepurpose of effecting separation between various grades of materialdischarged through the meshes of the drum. Suitably supported upon theframe of the machine adjacent to the upgoing side of the drum is ashield 25 which will guide the screened material to a suitable positionbe low the drum and prevent such material from being scattered over awide area by the cen trifugal action of the drum.

From the foregoing description taken in connection with the drawingshereto annexed, the operation and advantages of this invention will bereadily understood by those skilled in the art to which it appertains.

The construction is very simple and the improved screen may beconstructed and installed at a very moderate expense. The device will befound extremely useful for contractors, builders, stone-masons andothers who use large quantities of sand which must be carefully screenedand separated according to the various uses to which it is to be put.

Ordinary screening methods, especially when the sand is wet, have beenfoundvery ineffective in producing a thorough separation, especiallywhen various grades of finers are desired. I have found by practicalexperience that by this improved rotary screen the sand even when quitewet may be thoroughly and effectively separated into various gradessuitable for cement work, for ordinary brick and stone laying, forpointing up, and for other different uses. The device may also beeffectively employed by farmers and horticulturists for the purpose ofsifting and separating loam, fertilizing materials and the like, as wellas for mixing such materials.

A device constructed in accordance with this invention, even when madeof large capacity, may be made so light that it may be readily movedfrom one place to another, and the rotary movement of the drum maybeeffected without undue exertion by a boy while one or more men areengaged in shoveling material into the hopper. The solid portion 9 ofthe drum receives the direct impact of the material dropping from thehopper,

the fall being also broken by the arrangement of the inclined guidechutes,-and the drum, and especially the screen portion of the latterwill thus be protected from injury and guarded against excessive wear.

Having thus fully described the invention, what I claim as new is Arotary screen comprising a frame, a drum with a shaft rotatably mountedon the frame, said drum having longitudinal radial arms therein, ahopper on the frame, a slotted chute communicating with the hopper, anauxiliary chute communicating with the slotted chute, and with the inneropen end or mouth of the drum, an adjustable grading apron for the drum,and means for guiding the material and preventing the scattering of thesame, substantially as specified.

In testimony whereof, I affix my signature in presence of two witnesses.

GEORGE FRANKLIN SMAILES.

Witnesses:

C. E. WYETH, ROBERT E. FORGRAVE.

